At which stage of $HIV$ infection do the symptoms of $AIDS$ appear?

Arrange the following statements regarding $AIDS$ in the correct chronological order of the infection process:
$(1)$ After entering the individual's body,the $HIV$ virus enters macrophages,where the viral $RNA$ genome replicates into viral $DNA$ with the help of the reverse transcriptase enzyme.
$(2)$ $HIV$ enters helper $T$-lymphocytes.
$(3)$ $HIV$ has an $RNA$ molecule as its genetic material.
$(4)$ Newly formed viruses are released into the blood and attack other helper $T$-lymphocytes.
$(5)$ Viral $DNA$ is incorporated into the host cell's $DNA$.

The presence of the $HIV$ virus was first reported in:

$AIDS$ is caused by

Which enzyme helps in the replication of viral $RNA$ genome into viral $DNA$ within macrophages?

What is the nature of the protein coat and genetic material in $HIV$?